Bedstead construction.



R. BRADSHAW. BEDSTEAD CONSTRUCTiON. APPucATloN msn Juni 2. 191s.

Patented Feb. 6, 1917.

@NTFU @V114 RICHARD BRADSHAW, OF MONTREAL, QUEBEC, CANADA.

BEDSTEAD CONSTRUCTION.

Specification of Letters Patent.

Patented Feb. 6, 1917.

Application filed June 2, 1916. Serial No. 101,250.

`To all whom t may concern.'

Be it known that LRICHARD BRADsi-rnw, 'a citizen of the Dominion of Canada, residing at Montreal, in the Province of Quebec, Canada, have invented certain new and useful Improvements in Bedstead Constructions, of which the .following is a specification.

My invention relates to improvements in bedstead constructions, and has particular reference to a method of reinforcing metal castings which are subject to a considerable amount of tensile or transverse stress but which it is found to be not practical or economical to construct entirely of rolled or drawn metal having high tensile strength.

My invention will be found to be of particular service in reinforcing cast iron bracket members which form partsof bed spring frames. These bracket members have heretofore been made of ordinary chills, which I have found in my experience to be a continuous source of trouble, due to the inherent brittle character of cast iron which causes serious loss by breakage.

In the drawings accompanying this application, which show my invention as applied to the construction of a bed spring frame or support- Figure 1 is an under side perspective view of the bed spring and frame; Fig. 2 is a vertical section through the bracket; Fig. 8 is a fragmentary end elevation of Fig. 2 looking from the left of said figure; and Fig. 4 is a plan view of the bracket, partly in section.

Referring to the drawings, in Fig. 1 I have illustrated a particular kind of bed spring frame or support to which my invention is applied. In said frame, 10 and 11 are a pair of transverse angle iron members between which is stretched the bed spring or fabric 12. These transverse angle irons 10 and 11 are held apart against the pull of the spring 12 by means of a pair of strut members 13 and 14 which in the present case take the form of heavy tubes. Owing to the fact that the bed spring 12 must necessarily be permitted to sag under the weight of the person or persons occupying the bed, it is necessary that the tubes 13 shall be a substantial distance below the under side of the spring. The angle irons 10 and 11 are therefore mounted upon the ends of said tubes 13 and 14 by means of the brackets 15, 16, 17, and 18 which must necessarily be rigid and strong enough to resist the transverse pull of the spring, usually amounting to several hundred pounds.

Describing the application of my invention to said brackets and referring to Figs. 2, 3, and 4, it will be observed that the ,bracket 17 is cast directly upon the end of the tube 14, the outer or upper end of the bracket being secured directly to the vertical web 19 of the angle iron 10 by means of a pair of nuts 20. Said nuts 2O are threaded upon a pair of studs 21 which pass through an aperture 22 which is preferably made as a slot for the purpose of effecting a slight transverse adjustment of the bracket in case the main bedstead frame (not shown) is found to vary in size from standard dimensions. I

rl`he casting 17 4is preferably cast upon the ends of the studs 21 which are usually furnished with square or hexagonal heads 23, so that they are locked securely in the cast iron forming the bracket. Said bracket 17 when cast in the ordinary way upon the end of said tube 14 is subject to the objections hereinbefore referred to, due to the brittle nature of cast iron. When, however, constructed according to my invention, this difficulty is obviated in the following manner. Referring to Fig. 2, it will be observed that included within the casting of the bracket 17 is a bent rod 24, preferably of steel or iron or other tough material having a high tensile strength. This reinforcing member 24 is so located in the cross-section of the casting .17 that it has a maximum reinforcing effect. That is to say, it is placed at the position of maximum or substantially maximum tensile stress.

In order to hold the reinforcing rod 24 in position while the bracket 17 is being cast around the rod and upon the end of the tube 14, I originated the expedient of first securing the rod 24 in the end of the tube 14 before casting the bracket. To do this, I prefer to make a preliminary cast 25 in the end of the tube 14 while the rod 24 is inserted therein and supported in proper position. l/Vhile this preliminary cast is being made, the tube 14 is plugged at the point 26 with a small sand core, or by any other method, as is also done with the open end of the tube. Having made the preliminary cast 25, and having thus secured the rod 24 in proper position in the end of the tube 14, the ends of the tube and rod are placed in appropriate dies or molds and the chill is then cast around the rod 24. It is understood that While the chill 17 is being cast around the rod 24, the studs 21 are at the same time held properly in position in the molds, so that the metal Will flow around the heads and lock same securely in the bracket.

It should be understood that my invention is capable of being modified to suit individual requirements Without loss of efficiency or sacrificing the benefits of the invention; hence, the scope of the invention must be determined by reference to the appended claim. y

I claim- In a bed spring supporting frame, the

Copies of this patent may be obtained for ve cents each, by addressing the Washington, D. C.

combination oi a longitudinal tubular strut member located a sufficient distance below the spring level to permit sag of the spring when the bed is occupied, a cross member to Which the spring is secured, a metal filling cast in the end of said tube, a rod of high tensile strength having one of its ends seated in said filling and having the other end bent to projectv at an angle from said tube, and a cast ironbracket member cast aroundsaid reinforcing member and the end of the tube for connecting said cross member and said strut. l

RICHARD BRADSHAW.

Commissioner of lPatents, 

